BDD Backdraft Dampers

Keep air moving in the right direction with BDD Backdraft Dampers. Designed to prevent unwanted reverse airflow in ventilation systems, these dampers help improve efficiency while reducing drafts, odors, moisture intrusion, and energy loss. Available in both spring-loaded and gravity-operated designs, BDD dampers feature durable metal construction and lightweight aluminum butterfly blades for reliable, long-lasting performance.

Perfect for exhaust fans, inline duct fans, ventilation systems, greenhouses, grow rooms, workshops, and HVAC applications, BDD dampers automatically open when airflow is present and close when airflow stops, helping maintain proper ventilation and system performance.

Key Features

• Prevents backdrafts and reverse airflow
• Available in spring-loaded and gravity-operated models
• Durable steel or galvanized steel housing
• Lightweight aluminum butterfly damper blades
• Helps reduce energy loss and unwanted drafts
• Suitable for supply and exhaust applications
• Easy installation directly into ducting systems
• Ideal for HVAC, ventilation, greenhouse, and grow room applications